US20210293209A1 - Outboard engine cover structure - Google Patents
Outboard engine cover structure Download PDFInfo
- Publication number
- US20210293209A1 US20210293209A1 US17/202,585 US202117202585A US2021293209A1 US 20210293209 A1 US20210293209 A1 US 20210293209A1 US 202117202585 A US202117202585 A US 202117202585A US 2021293209 A1 US2021293209 A1 US 2021293209A1
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- United States
- Prior art keywords
- ribs
- communication port
- cover
- intake
- surface portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/1015—Air intakes; Induction systems characterised by the engine type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H20/00—Outboard propulsion units, e.g. outboard motors or Z-drives; Arrangements thereof on vessels
- B63H20/32—Housings
Definitions
- the outer cover 60 is formed by combining an outer front surface portion 63 , an outer rear surface portion 64 , an outer left side surface portion 65 , an outer right side surface portion 66 , and an outer upper surface portion 67 , and each portion is formed by a panel-like cover member.
- the outer front surface portion 63 covers the front surface of the engine 22
- the outer rear surface portion 64 covers the rear surface of the engine 22 .
- the outer left side surface portion 65 covers the left side surface of the engine 22
- the outer right side surface portion 66 covers the right side surface of the engine 22 .
- the outer upper surface portion 67 covers the upper surface of the engine 22 .
Abstract
Description
- This application claims priority to and the benefit of Japanese Patent Application No. 2020-049816 filed on Mar. 19, 2020, the entire disclosure of which is incorporated herein by reference.
- The present invention relates to an outboard engine cover structure.
- Since an outboard engine is used on the water surface, it is necessary to prevent water intrusion, rust, and salt damage. Japanese Patent Laid-Open No. 2013-23119 discloses a structure in which an outboard engine is covered with a cover.
- When taking in air for an engine or taking in air for cooling, it is desirable to sufficiently remove water and the like. The related art still has room for improvement in this respect.
- It is an object of the present invention to provide a technique capable of effectively removing water and the like to be taken in to an outboard engine.
- According to an aspect of the present invention, there is provided an outboard engine cover structure that covers an outboard engine and includes an inner cover on an inside and an outer cover on an outside, comprising: a flow space for air formed between the inner cover and the outer cover; an intake formed in a lower portion of the outer cover and configured to take in outer air to the flow space; a communication port formed in the inner cover in a position above the intake, and configured to cause an inner space of the inner cover accommodating the outboard engine to communicate with the flow space; first ribs arranged between the intake and the communication port in the flow space; and second ribs arranged between the intake and the communication port and positioned closer to the communication port than the first ribs in the flow space.
- Further features of the present invention will become apparent from the following description of exemplary embodiments (with reference to the attached drawings).
-
FIG. 1 is a side view showing the overall structure of an outboard engine: -
FIG. 2 is an exploded perspective view schematically showing the structures of an inner cover and an outer cover; -
FIG. 3 is a front view of an upper cover: -
FIG. 4 is a sectional view taken along a line A-A inFIG. 3 ; and -
FIG. 5 is a front view of an inner front surface portion. - Hereinafter, embodiments will be described in detail with reference to the attached drawings. Note that the following embodiments are not intended to limit the scope of the claimed invention, and limitation is not made an invention that requires all combinations of features described in the embodiments. Two or more of the multiple features described in the embodiments may be combined as appropriate. Furthermore, the same reference numerals are given to the same or similar configurations, and redundant description thereof is omitted.
-
FIG. 1 is a side view of anoutboard engine 10 using acover 12 having a structure according to an embodiment of the present invention. Theoutboard engine 10 is attached to a ship hull Sh as a power source of a small ship or the like, and propels the ship hull Sh by being driven by a user's operation. InFIG. 1 . Fr indicates the front side in the front-and-rear direction of theoutboard engine 10, and Re indicates the rear side. When mentioning the direction of theoutboard engine 10, this direction means a direction when theoutboard engine 10 is mounted on the ship hull Sh (particularly a direction in the posture when theoutboard engine 10 is operated with acrank shaft 34 pointing in the vertical direction as shown inFIG. 1 ). - The
outboard engine 10 is fixed to the ship hull Sh via anattaching mechanism 16. Theattaching mechanism 16 can swing theoutboard engine 10 around aswivel shaft 18, and can swing theoutboard engine 10 clockwise or counterclockwise around atilt shaft 20. Fins 54 are positioned underwater when theoutboard engine 10 is in the posture shown inFIG. 1 . - The
cover 12 has anengine 22, adrive shaft 24, agear mechanism 26, and apropeller mechanism 28 inside. Also, below theengine 22, theoutboard engine 10 has an exhaust system (not shown) for causing the exhaust gas of theengine 22 to flow, and acooling structure 29 for cooling theengine 22 and the exhaust gas. - The
cooling structure 29 is formed by, for example, stacking a plurality of cases inside thecover 12. Thecooling structure 29 can have a silencing function that is implemented by causing cooling water (seawater or fresh water obtained from outside the outboard engine 10) to flow around the exhaust pipe (not shown) of the exhaust gas. - The
engine 22 is a multicylinder engine (for example, a V-type engine) including a plurality ofcylinders 30 along the vertical direction of theoutboard engine 10. Theengine 22 has a structure in which the axis of eachcylinder 30 is arranged sideways (almost horizontally). Thecrank shaft 34 to be coupled with a connectingrod 32 of eachcylinder 30 is extended in the vertical direction. Water jackets are formed for acylinder block 36 and acylinder head 38 of theengine 22, and can cool these members by using the cooling water of thecooling structure 29. - The
crank shaft 34 is coupled with the upper end of thedrive shaft 24. Thedrive shaft 24 is extended in the vertical direction inside thecover 12, and rotated together with the rotation of thecrank shaft 34. The lower end of thedrive shaft 24 is coupled with thegear mechanism 26. When anoperation shaft 40 is operated, thegear mechanism 26 rotates thepropeller mechanism 28 by switching the driving forces of theengine 22, thereby moving the ship hull Sh forward or backward. Theoperation shaft 40 is rotated by, for example, ashift actuator 40 a that is driven in accordance with a user's shift operation. - When the
operation shaft 40 rotates, thegear mechanism 26 moves ashift slider 42 forward or backward in the axial direction of apropeller shaft 50. Consequently, theshift slider 42 moves adog clutch 48 between a forward drivenbevel gear 46 a and a backward drivenbevel gear 46 b that mesh with adriving bevel gear 44 coupled to thedrive shaft 24. When the tooth surface of thedog clutch 48 meshes with one of the inside tooth surface of the forward drivenbevel gear 46 a and the inside tooth surface of the backward drivenbevel gear 46 b, the driving force of theengine 22 is transmitted to thepropeller mechanism 28 via thedog clutch 48 and thepropeller shaft 50. - The
propeller mechanism 28 includes thecylindrical propeller shaft 50 into which theshift slider 42 is inserted, acylindrical member 52 coupled with the outside of thepropeller shaft 50 in the radial direction, and the plurality offins 54 coupled with the outer circumferential surface of thecylindrical member 52. Thepropeller mechanism 28 rotates thefins 54 clockwise or counterclockwise around thepropeller shaft 50 rotated by thegear mechanism 26, thereby moving the ship hull Sh forward or backward. - The
cover 12 includes anupper cover 56 mainly covering theengine 22 positioned in the upper portion of theoutboard engine 10, and alower cover 58 mainly covering members below theengine 22. For example, theupper cover 56 and thelower cover 58 are fixed to a mount frame (not shown) for mounting theengine 22, and divided from the mount frame as the boundary. Agear case 59 forming thegear mechanism 26 is coupled with the lower end of thelower cover 58. - The
upper cover 56 is a hollow body covering the front and rear sides, the left and right sides, and the upper and lower sides of theengine 22, and has a double structure including anouter cover 60 on the outside and aninner cover 70 on the inside. Theouter cover 60 may have a dividable structure formed by a plurality of members, and theinner cover 70 also has a dividable structure formed by a plurality of members.FIG. 2 is an exploded perspective view schematically showing members of theinner cover 70 and theouter cover 60. In this embodiment, theinner cover 70 and theouter cover 60 each form a hollow body covering theengine 22. - The
outer cover 60 is formed by combining an outerfront surface portion 63, an outerrear surface portion 64, an outer leftside surface portion 65, an outer rightside surface portion 66, and an outerupper surface portion 67, and each portion is formed by a panel-like cover member. The outerfront surface portion 63 covers the front surface of theengine 22, and the outerrear surface portion 64 covers the rear surface of theengine 22. The outer leftside surface portion 65 covers the left side surface of theengine 22, and the outer rightside surface portion 66 covers the right side surface of theengine 22. The outerupper surface portion 67 covers the upper surface of theengine 22. - An
edge 63 a of the outerfront surface portion 63, an edge 64 a of the outerrear surface portion 64, anedge 65 a of the outer leftside surface portion 65, anedge 66 a of the outer rightside surface portion 66, and an edge 67 a of the outerupper surface portion 67 are detachably attached to each other by a fixing structure (not shown), for example, an engaging structure or a fastening structure such as screw clamp. - The
inner cover 70 is formed by combining an innerfront surface portion 73, an innerrear surface portion 74, an inner left side surface portion 75, an inner rightside surface portion 76, and an inner upper surface portion 77, and each portion is formed by a panel-like cover member. The innerfront surface portion 73 is positioned between the outerfront surface portion 63 and the front surface of theengine 22, and covers the front surface of theengine 22. The innerrear surface portion 74 is positioned between the outerrear surface portion 64 and the rear surface of theengine 22, and covers the rear surface of theengine 22. The inner left side surface portion 75 is positioned between the outer leftside surface portion 65 and the left side surface of theengine 22, and covers the left side surface of theengine 22. The innerright surface portion 76 is positioned between the outerright surface portion 66 and the right side surface of theengine 22, and covers the right surface portion of theengine 22. The inner upper surface portion 77 is positioned between the outerupper surface portion 67 and the upper surface of theengine 22, and covers the upper surface of theengine 22. - An
edge 73 a of the innerfront surface portion 73, an edge 74 a of the innerrear surface portion 74, anedge 75 a of the inner left side surface portion 75, anedge 76 a of the inner rightside surface portion 76, and an edge 77 a of the inner upper surface portion 77 are detachably attached to each other by a fixing structure (not shown), for example, an engaging structure or a fastening structure such as screw clamp. -
Openings 78 for maintenance of theengine 22 are formed in the inner left side surface portion 75 and the inner rightside surface portion 76. Maintenance of theengine 22 can be performed through theopenings 78 by detaching theouter cover 60. Aspace 68 between the innerrear surface portion 74 and the outerrear surface portion 64 forms a part of an intake air passage. Asilencer 69 for reducing the air intake noise is formed on the innerrear surface portion 74. - An intake 1 for outer air is formed in the lower portion of the outer
front surface portion 63, and a flow space SP for air taken in from the intake 1 is formed between the outerfront surface portion 63 and the innerfront surface portion 73. In the innerfront surface portion 73,communication ports communication ports front surface portion 73 in the thickness direction, and make the internal space of theinner cover 70 accommodating theengine 22 communicate with the flow space SP. - Air taken in from the intake 1 is supplied to the
engine 22 through the flow space SP and thecommunication ports electric parts 22 a such as an electronic circuit and a fuse box,accessories 22 b such as an alternator, andaccessories 22 c such as a fuel paper filter, of theengine 22. - Since the intake 1 is formed in the outer
front surface portion 63 forming the front surface of theouter cover 60, the navigation wind is easily taken in during navigation. It is also possible to prevent water from entering theengine 22 because the intake 1 is formed in the lower portion of the outerfront surface portion 63, which is the upper portion of the stem of the ship hull Sh where water does not easily enter. - <Water Removing Structure>
- There is seawater or fresh water around the
outboard engine 10, so air to be taken in from the intake 1 contains water. Arrival of this water at theengine 22 is undesirable from the viewpoints of rust and salt damage. This embodiment has a structure that effectively removes water in the flow space SP. This structure will be explained with reference toFIGS. 3 to 5 .FIG. 3 is a front view of theupper cover 56, and is a view showing theupper cover 56 from the front side of the ship hull Sh.FIG. 4 is a sectional view taken along a line A-A inFIG. 3 , and shows the structures of the outerfront surface portion 63 and the innerfront surface portion 73 around the intake 1.FIG. 5 is a front view of the innerfront surface portion 73, and shows the internal structure of the flow space SP. - The intake 1 of this embodiment is a slit-like opening extending in the horizontal direction, and a plurality of intakes 1 are formed in the vertical direction. As is understood mainly from
FIG. 4 , the intakes 1 are formed in awall portion 1 a of the outerfront surface portion 63. Thewall portion 1 a forms an L-shaped recess together with awall portion 1 b below thewall portion 1 a. - The
wall portion 1 a is an inclined wall whose front side is slightly higher than the horizontal level, and the intake 1 extends through thewall portion 1 a in the thickness direction. Consequently, the intake 1 opens obliquely downward toward the front side (Fr) of the ship hull Sh, thereby preventing easy intrusion of water. Also, thewall portion 1 b is an inclined wall that inclines downward from the rear (Re) side to the front side of the ship hull Sh, so the navigation wind taken in to the intake 1 easily hits thewall portion 1 b. As a consequence, water of the navigation wind adheres to thewall portion 1 b, and this suppresses the intrusion of water into the flow space SP. - The flow space SP is formed as a gap between the outer
front surface portion 63 and the innerfront surface portion 73. As mainly shown inFIG. 5 , the innerfront surface portion 73 has a pair of entrance ribs 4 projecting toward the outerfront surface portion 63, a pair ofside ribs 9, and anupper rib 8, and these ribs define the flow space SP. The pair ofside ribs 9 are plate-like ribs extending in the vertical direction as they are spaced apart to the left and right. Theupper rib 8 is a plate-like rib extending in the horizontal direction. - The pair of entrance ribs 4 are plate-like ribs extending in the horizontal direction and spaced apart to the left and right. A space between the pair of entrance ribs 4 forms an entrance 4 a of the flow space SP. Air taken in from the intake 1 flows into the flow space SP through the entrance 4 a. The width of the entrance 4 a is made smaller than that of the intake 1, and the entrance 4 a is positioned in a central portion of the flow space SP in the horizontal direction.
- When air taken in from the intake 1 hits the entrance ribs 4, water of the navigation wind adheres to the entrance ribs 4, and this suppresses the intrusion of water into the flow space SP. In addition, since the entrance 4 a is positioned in the central portion in the horizontal direction and so the navigation wind is guided to the central portion of the flow space SP in the horizontal direction, it is possible to control the flow of the navigation wind and make the wind hit lower ribs 5 (to be described later).
- The
communication ports front surface portion 73 in positions above the intake 1. In this embodiment, thecommunication ports front surface portion 73, and particularly thecommunication port 3 is formed in the uppermost portion of the flow space SP. Since thecommunication pots - The
communication port 2 is adjacent to theelectric parts 22 a and contributes to cooling of theelectric parts 22 a. Thecommunication port 3 is adjacent to theaccessories 22 b and contributes to cooling of theaccessories 22 b. Since thecommunication ports - Both the
communication ports communication port 2 is a long opening traversing the flow space SP in the horizontal direction, whereas thecommunication port 3 is a short opening formed in only the central portion. Since thecommunication port 3 has a smaller opening area, it is possible to increase the flow velocity and enhance the effect of cooling theaccessories 22 b. - Note that the two
communication ports - The inner
front surface portion 73 has thelower ribs 5 and upper ribs 6 that resist air flowing from the intake 1 to thecommunication ports lower ribs 5 and the upper ribs 6 include a plurality of plate-like ribs projecting toward the outerfront surface portion 63, and define the interior of the flow space SP. Thelower ribs 5 are arranged between the intake 1 and thecommunication ports communication portions communication ports lower ribs 5. Air flowing from the intake 1 to thecommunication ports lower ribs 5 and the upper ribs 6, and this increases the water removing efficiency. - The
lower ribs 5 include a plurality ofribs 5 a to 5 c arrayed in the form of a mountain as a whole, and so arranged as to surround, together with the pair of entrance ribs 4, a lower portion SP1 in the central portion of the flow space SP in the horizontal direction. This makes it possible to more reliably cause air flowing into the lower portion SP1 to hit thelower ribs 5, thereby increasing the water removing efficiency. - The
rib 5 a is arranged in the central portion of the flow space SP in the horizontal direction, and is a mountain-shaped rib projecting upward. A pair of ribs 5 b are medium ribs arranged below therib 5 a and spaced apart to the left and right. The pair of ribs 5 b are plate-like ribs extending in the horizontal direction, and are inclined ribs that incline downward from the center to the outside in the horizontal direction. Each rib 5 b is so arranged as to extend outside from therib 5 a in the horizontal direction. - A pair of ribs 5 c are lower ribs arranged below the pair of ribs 5 b and spaced apart to the left and right more than the pair of ribs 5 b. The pair of ribs 5 c are plate-like ribs extending in the horizontal direction, and are inclined ribs that incline upward from the center to the outside in the horizontal direction. Each rib 5 c is so arranged as to extend outside from the rib 5 b in the horizontal direction.
- Since the pair of ribs 5 c close to the entrance 4 a are greatly spaced apart to the left and right, air flowing into the entrance 4 a can be easily guided to the
ribs 5 a and 5 b, thereby promoting the interference with theribs 5 a and 5 b. In addition, since the pair of ribs 5 c close to the entrance 4 a incline upward from the central side to the outside of the horizontal direction, the water attached to the ribs 5 c or dropping downward can be easily drained from the entrance 4 a. - Since the pair of medium ribs 5 b incline downward from the center to the outside in the horizontal direction, air flowing into the entrance 4 a can easily be guided to the
rib 5 a, and this promotes the interference between the air and therib 5 a. Also, theupper rib 5 a is arranged in the center in the horizontal direction and has a mountain-like shape. Since this prevents air flowing into the entrance 4 a from directly flowing to thecommunication ports - The upper ribs 6 include a pair of
ribs 6 a spaced apart to the left and right. Air passing through thelower ribs 5 hits the pair ofribs 6 a, so water is further removed. The air arrives at thecommunication ports passage portion 6 b between the pair ofribs 6 a. Thecommunication portion 6 b functions as a throttle and increases the flow velocity of the air, so the air having a high flow velocity can be supplied to theengine 22 through thecommunication ports - The
passage portion 6 b is positioned in the central portion of the flow space SP in the horizontal direction, and the pair ofribs 6 a are plate-like ribs inclining from the central portion to the outside in the horizontal direction. This inclination of the pair ofribs 6 a makes it possible to evenly supply air having passed thepassage portion 6 b to thecommunication ports - The inner
front surface portion 73 has plate-like ribs 7 extending in the vertical direction, on the left and right sides of thecommunication port 3. The ribs 7 can efficiently guide air to thecommunication port 3 having a small area. - The action of the water removing structure having the above configuration will be explained with reference to
FIG. 5 . The broken-line arrows shown inFIG. 5 schematically indicate the flows of air. Air taken in to the intake 1 flows into the flow space SP from the entrance 4 a. During that time, water and the like are removed from the air by the interference with thewall portions 1 b and the entrance ribs 4. - The air having passed the entrance 4 a is first guided to the lower portion SP1. In this portion, the
lower ribs 5 and the air interfere with each other, and water and the like are removed. Since thelower ribs 5 are formed as a group of a plurality of ribs, an air escape passage is secured, so a significant decrease in flow velocity can be prevented. - The air having passed the
lower ribs 5 flows into a middle portion SP2. After that, the upper ribs 6 and the air interfere with each other, and water and the like are further removed. Since the upper ribs 6 are also formed as a group of a plurality of ribs, an air escape passage is secured, so a significant decrease in flow velocity can be prevented. Since the pair ofribs 6 a are inclining, water attached to theribs 6 a falls down in the central portion of the flow space SR and the air having passed thepassage portion 6 b diffuses to the left and right. - The air having passed the upper ribs 6 enters the inner space of the
inner cover 70 from thecommunication port engine 22 can be cooled or intake air can be supplied. - In this embodiment as described above, the upper and
lower ribs 5 and 6 remove water in two stages. This can increase the efficiency of removal, and can also prevent a large decrease in flow velocity. - The ribs are formed in the inner
front surface portion 73 in the above embodiment, but all or some of the ribs may also be formed in the outerfront surface portion 63. In addition, the intake 1 and thecommunication ports front surface portion 73 and the outer front surface portion 63), but they may also be formed in another portion such as the cover side surface portions. - The above embodiments disclose at least the following cover structures.
- 1. A cover structure of the above embodiment is an outboard engine cover structure that covers an outboard engine (22) and includes an inner cover (70) on an inside and an outer cover (60) on an outside, comprising:
- a flow space (SP) for air formed between the inner cover (70) and the outer cover (60);
- an intake (1) formed in a lower portion of the outer cover (60) and configured to take in outer air to the flow space (SP);
- a communication port (2, 3) formed in the inner cover (70) in a position above the intake (1), and configured to cause an inner space of the inner cover (70) accommodating the outboard engine (22) to communicate with the flow space (SP);
- first ribs (5) arranged between the intake (1) and the communication port (2, 3) in the flow space (SP); and
- second ribs (6) arranged between the intake (1) and the communication port (2, 3) and positioned closer to the communication port (2, 3) than the first ribs (5) in the flow space (SP).
- This embodiment can provide a technique capable of more effectively removing water and the like to be taken in to an outboard engine. Two-stage water removal by the first ribs and the second ribs can improve the efficiency of water removal without largely decreasing the flow velocity.
- 2. In the above embodiment,
- the inner cover (70) has an inner front surface portion (73) configured to cover a front surface of the outboard engine (22) when the outboard engine (22) is mounted on a ship hull (Sh),
- the outer cover (60) has an outer front surface portion (63) arranged to overlap the inner front surface portion (73), and configured to cover the front surface of the outboard engine (22),
- the flow space (SP) is formed between the inner front surface portion (73) and the outer front surface portion (63),
- the intake (1) is formed in the outer front surface portion (63), and
- the communication port (2, 3) is formed in the inner front surface portion (73).
- This embodiment can efficiently take in the navigation wind.
- 3. In the above embodiment, the intake (1) opens obliquely downward toward a front side of the ship hull (Sh).
- This embodiment can suppress the intrusion of seawater and fresh water.
- 4. In the above embodiment, the cover structure further comprises a pair of left and right entrance ribs (4) formed between the first ribs (5) and the intake (1), and configured to guide outer air taken in to the intake (1) to a central portion of the flow space (SP) in a horizontal direction.
- This embodiment can control the flow of outer air to the central portion.
- 5. In the embodiment, the first ribs (5) are arranged to surround a lower portion (SP1) of the central portion of the flow space (SP) in the horizontal direction, together with the pair of left and right entrance ribs (4).
- This embodiment can increase the efficiency of interference with the first ribs by guiding outer air to the lower portion.
- 6. In the above embodiment, the first ribs (5) include:
- a mountain-shaped rib (5 a) arranged in the central portion of the flow space in the horizontal direction and projecting upward;
- a pair of medium ribs (5 b) arranged below the mountain-shaped rib (5 a) and spaced apart to left and right; and
- a pair of lower ribs (5 c) arranged below the pair of medium ribs (5 b) and spaced apart to left and right more than the pair of medium ribs (5 b).
- This embodiment can increase the efficiency of removal of water and the like and suppress a large decrease in flow velocity at the same time.
- 7. In the above embodiment, the second ribs (6) include a pair of ribs (6 a) spaced apart to left and right.
- This embodiment can increase the flow velocity by a throttle.
- 8. In the above embodiment,
- the communication port (2, 3) includes a first communication port (2), and a second communication port (3) formed above the first communication port (2), and
- ribs (7) extending in a vertical direction are formed on left and right sides of the second communication port (3).
- This embodiment can allow air to easily flow into the second communication port.
- 9. In the above embodiment, the second communication port (3) has an opening area smaller than that of the first communication port (2).
- This embodiment can increase the flow velocity of air passing through the second communication port.
- The invention is not limited to the foregoing embodiments, and various variations/changes are possible within the spirit of the invention.
Claims (9)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2020-049816 | 2020-03-19 | ||
JP2020049816A JP2021146932A (en) | 2020-03-19 | 2020-03-19 | Cover structure of engine for outboard engine |
JPJP2020-049816 | 2020-03-19 |
Publications (2)
Publication Number | Publication Date |
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US20210293209A1 true US20210293209A1 (en) | 2021-09-23 |
US11326563B2 US11326563B2 (en) | 2022-05-10 |
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Application Number | Title | Priority Date | Filing Date |
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US17/202,585 Active US11326563B2 (en) | 2020-03-19 | 2021-03-16 | Outboard engine cover structure |
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JP (1) | JP2021146932A (en) |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2001342919A (en) * | 2000-05-31 | 2001-12-14 | Sanshin Ind Co Ltd | Four-cycle engine of outboard motor |
JP4489312B2 (en) * | 2000-08-25 | 2010-06-23 | 本田技研工業株式会社 | Outboard motor |
CA2434998C (en) * | 2002-07-18 | 2010-05-25 | Honda Giken Kogyo Kabushiki Kaisha | Cover joining structure for outboard engine unit |
CN103703239B (en) * | 2011-07-23 | 2016-01-20 | 本田技研工业株式会社 | Machine outside |
JP5688341B2 (en) * | 2011-07-23 | 2015-03-25 | 本田技研工業株式会社 | Outboard motor |
JP5712075B2 (en) | 2011-07-23 | 2015-05-07 | 本田技研工業株式会社 | Outboard motor |
CA2794139C (en) * | 2011-11-02 | 2014-08-05 | Honda Motor Co., Ltd. | Outboard engine unit |
JP6549642B2 (en) * | 2017-06-14 | 2019-07-24 | 本田技研工業株式会社 | Vehicle intake structure |
-
2020
- 2020-03-19 JP JP2020049816A patent/JP2021146932A/en active Pending
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2021
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JP2021146932A (en) | 2021-09-27 |
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